White-faced Whistling Duck (Dendrocygna viduata) adult and duckling, Kruger National Park, South Africa, Africa

Brant's whistling rat (Parotomys brantsii) feeding, Kgalagadi Transfrontier Park, encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Brant's whistling rat (Parotomys brantsii), Kgalagadi Transfrontier Park, South Africa, Africa

Brant's whistling rat (Parotomys brantsii), Kgalagadi Transfrontier Park, South Africa, Africa

White-faced Whistling Duck (Dendrocygna viduata) adults and ducklings, Kruger National Park, South Africa, Africa

The whistling kite (Haliastur sphenurus) with gingery-brown feathers flies against the blue sky, Desert Park at Alice Springs near MacDonnell Ranges, Northern Territory, Australia, Pacific

A flock of white-faced whistling ducks (Dendrocygna viduata), Zambezi River, Mosi-oa-Tunya National Park, Zambia, Africa

Brant's whistling rat (Parotomys brantsii) peeping out of burrow, Kgalagadi Transfrontier Park, South Africa, africa

Brant's whistling rat (Parotomys brantsii), Kgalagadi Transfrontier Park, encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Brant's whistling rat (Parotomys brantsii) in the Kalahari, Kgalagadi Transfrontier Park, Northern Cape, South Africa, Africa

Brant's whistling rat (Parotomys brantsii), Kgalagadi Transfrontier Park encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Whistling Sands Beach, Porthor, Llyn Peninsula, Gwynedd, Wales, United Kingdom, Europe

Brant's whistling rat (Parotomys brantsii), Kgalagadi Transfrontier Park, encompasing the former Kalahari Gemsbok National Park, South Africa, Africa

Wandering Whistling-duck, Queensland, Australia

Ganga Aarti Hindu ceremony at Dasaswamedh Ghat, Varanasi, Uttar Pradesh, India, Asia

Common Dolphins approaching clicking and whistling, Azores Portugal

The feet of a Whistling duck at Martin Mere bird reserve near Ormskirk, Lancashire, England, United Kingdom, Europe

Flocks of Whistling Ducks on the Cooper Creek Billabong, Australia

Texas Brown Tarantula (Aphonopelma hentzi), adult at sunset in defense posture, Sinton, Corpus Christi, Texas, USA

Krapfen, Berliner and donuts with streamers and confetti. Colorful carnival, birthday and Fasching image

Texas Brown Tarantula (Aphonopelma hentzi), adult at sunset in defense posture, Sinton, Corpus Christi, Coastal Bend, Texas, USA

Traditional Berliner for carnival and party. German Krapfen or donuts with streamers and confetti. Colorful carnival or birthday image

Tarantula (Citharacanthus spinicrus) on a banana leaf, Orinoco Delta National Park, Venezuela, South America

Fulvous Whistling-Duck (Dendrocygna bicolor), adult flapping wings in wetland, Sinton, Corpus Christi, Texas Coast, USA

Texas Brown Tarantula (Aphonopelma hentzi), adult silhouetted at sunset, Rio Grande Valley, Texas, USA

White-faced Whistling Duck in flight, Djoudj National Bird Sanctuary, Republic of Senegal, Africa

White-faced Whistling Duck, Dendrocygna viduata

A Black-bellied whistling duck (Dendrocygna autumnalis) or "Sirir Vientre Negro", walks along the shallows on the edge of a floating island in Laguna Ibera, Ibera Natural Reserve, Esteros del Ibera, Corrientes Province, Argentina

Doorman blowing whistle and raising arm